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The percentage of the tickets for the dance that were purchased in advance is 9%.
What is the percentage of the tickets that were bought in advance?
Percentage is the fraction of an amount that is expressed as a number out of hundred. The sign used to represent percentage is %.
Percent of advance tickets bought = (number of advance tickets / total number of tickets) x 100
(18 / 200) x 100 = 9%
To learn more about percentages, please check: https://brainly.com/question/25764815